关键词: 云南, 秋海棠属, 资源分布, 观赏性状

Abstract: Based on the studies of literatures, field investigation, introduction and cultivation on the genus Begonia Linn. in Yunnan, the geographical distribution, basic morphological characteristics, ornamental values and their cultural characters were summarized in this paper. It was indicated that Yunnan is very
rich in Begonia resources. There are 101 species ( subspecies and varieties) of Begonia were recorded in Yunnan. Among them, 72 species are endemic to Yunnan. B egon ia iswidely distributed in the whole province but its natural distribution center is located at SE Yunnan The lowest altitude of its distribution of the genus in Yunnanis only 90m and the highest altitude is 3400 m above sea level. Among the known species from Yunnan, 50 species are rhizomatous Begonia, 28 species are erect stemmed Begonia and 23 species are tuberous
Begonia. The distribution of rhizomatous Begonia is from 90 m to 3000 m. This type of Begonia requires relatively higher temperature and moisture in cultivation and many species are suitable for pot plant for foliage
ornamental purpose. The erect stemmed B egon ia is distributed from 100 m to 3200 m and requires high temperature and moisture in cultivation. They are suitable for pot and bed p lants. The distribution of tuberous Begonia is from 720 m to 3400 m. Most species of tuberous type of Begon ia donpt require higher temperature and moisture in cultivation and they are suitable for pot plant and breeding purpose.

Key words: Yunnan, Begonia, Resources, Ornamental character